Portion of a cleaning sheet



FIG. 1 is a perspective view of the portion of a cleaning sheet, embodying the new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof; and,

FIG. 5 is a side elevational view thereof, the opposite side is a mirror image thereto.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a portion of a cleaning sheet, as shown and described. 